John r



UNITED STATES Parent rrrcn,

JOHN R. SEES, OF NElV YORK, N. Y.

ARRANGEMENT OF MEANS FOR HEATING FEED-WATER OF LOCOMOTIVE-ENGINES.

Specification forming part of Letters Patent No. llfi,'IWll, datedNovember 11 1856.

T0 ctZZ whom it may concern:

Be it known that I, JOHN R. SEES, of the city, county, and State of NewYork, have invented a new and useful Arrangement for Heating theFeedater of the Boilers of Locomotive-Engines on its Passage from theFeed or Force Pump to the Boiler; and I do hereby declarethat thefollowing is a fulland exact description of the same, reference beinghad to the accompanying drawing, and to the letters oi. reference markedthereon, in which Figure 1 is a perspective view of the smokehox end ofa locomotive-boiler, showing the arrangement of the heating-pipes andtheir connections; Fig. 2, a vertical section, and Fig. 3 a top view, ofthe heating-pipes detached, and Fig. e a vertical section of thedouble-acting check-valve and its chamber detached.

A is the smoke-box of a locomotive-boiler with the end covering removedto show the arrangement of the heating-pipes and their connections; B, aportion of the body or cylindrical part of the boiler; O, the rear endof the tubes through which the products of combustion pass to the smokebox and stack; D, the pipe from the feed-pump, attached to the lower endof the checlevalve chamber E 5 F, pipe connecting the check-valvechamber to the bottom of the outer coiled heating-pipe G; H, pipeconnecting the top of the inner coiled heating-pipe I to the body oftheboiler.

G and I are the heating-pipes formed of two separate coils of pipecoiled in cylindrical form and placed one within the other at suchdistance apart as to form between them an annular space of sufficientcapacity to form a passage through which a portion of the heated gasescan pass. The bottom of the cylindric coils is placed just below thelower tier of tubes, and the top of them at or below the height of thewater-line of the boiler, for purposes hereinafter mentioned. Theheating-pipes and their connecting-pipes are made about equal in size tothe feed-pipe D, to create as little obstacle to the free passage of thewater through them as is consistent with the other requirements of them.

The feed-water is taken in at the bottom of the outer coil ofheating-pipe and passes to the top of it, and is carried to the innercoil at the bottom by the connecting-pipe J, and

is taken from the top of it by the connectingpipe H to the body of theboiler; or the feedwater may be taken in at the top of the outer coil,and the two coils may be connected together at the bottom of each, andthe water taken from thetop of. the inner one, as before described. Thecoils of both cylinders are placed apart from each other about one-fourth inch to afford a passage for the heated gases between them. TheeXl'iaust-pipes K K of the engine are so placed that their nozzles shallcome beneath the lower line of the in ner cylindric coil and within itsinterior opening, for the purpose of guiding the column of exhaust-steamto the base of the smoke-stack, to prevent its being broken up anddisseminated throughout the smoke-box, by which its effect would beinjured, and to produce within the inner cylindric coil a displacementof the air and gases that will cre ate a passage throughit of thefreshly-heated gases from the tubes. The heated gases from the lowertubes find entrance to the inner cylindric coil directly at the bottomof it, that from the middle tiers of tubes through the intersticesbetween the coils, and that from the upper tiers of tubes through theannular space between the inner and outer cylinders by the down warddraft created thereby, theimp ulsive action oftheexhaust-steambeinggreaterat the bottom than at the top of the cylindric coils, sothat the action of the exhaust-steam equal izes the draft through allthe tubes and makes them all equally effective. By taking the feed-waterinto the outer coil of heating-pipe it gets sufficiently heated beforereaching the inner coil to prevent the condensation of the exhaust-steamwithin the inner coil thatwould occur it but a single coil were made useof.

L is a circulating'pipe attached at one end to the top of thecheck-valve chamber E and at the other to thebodyof the boiler, throughwhich a circulation of the water of the boiler is kept up through theheating-pipes when the supply from the feed-pump is shut on";

M is a double-acting check-valve so constructed and arranged within thechamber E that when the feed-pump is forcing water to the chamber thelower valve of it is opened to permit that water to pass through thepipe F to the heating-pipes, while the upper valve of it is closed, andwhen the supply of water from the pump is shutoff or stopped that thelower Valve is closed and the upper one opened to allow the water in theboiler to circulate t-h rough the heatingpipes and keep them filled.This circulation avoids the danger of the pipes being emptied of waterby being overheated, when the feed-water is shut 0% from them, and canonly occur when the heating-pipes and their connections are placed at orbelow the height of the water-line of the boiler.

N is the base of the smoke-stack or chimney.

The heating-pipes are represented as being attached to only one of thepumps of the engine, which is all that is ordinarily used, for thepurpose of saving the expense and encumbrance of the additional partsrequisite to at tach it to both. The duplicate pump being generally usedonlyin case of a failure in the operation of the other, I would attachit directly to the boiler, as at present practiced.

By constructing the heating-pipes in the form and arranging them in theposition and manner described the feed-water is heated by theescape-heat, that would otherwise be wasted, to a point that produces adesirable economy in fuel over the present general practice of feedingthe boiler with cold water,while they equalize the draft throughout thewhole series of tubes and increase their efficient action. They arecompact in form, are easily removed and replaced when it is necessary torepair them or to get at the tubes of the boiler to repair, take up noroom that is required for other purposes, and present less obstructionto the passage of Water through them than can be effected in the samelength of pipe arranged for the same purpose in any other practicalform.

I do not claim heating the feed-water of a steam-boiler in its passagefrom the feed-pump to the boiler, nor heating it by the waste orescape-heat from the boiler, nor placing the heating-pipes in thesmoke-box of the boiler, as they are known and used; neither do I claimthe use of the circulating-pipe and double-acting check-valve, norplacing the heating-pipes and their connections below the water-line ofthe boiler, as secured to me by Letters Patent dated August 5, 1856; but

7 hat I do claim as my invention, and de sire to secure by LettersPatent, is

The construction of the duplicate cylindrical coils G and I and theirarrangement in relation to the smoke-box A, the exhaust-pipes K K, thetubes 0, and the base N of the SIHOkQ'SULCli of a locomotive-boiler, asand for the purposes herein set forth.

JOHN R. SEES. Witnesses:

FRANCIS S. Low, M. I-IAsKELL.

